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Opened 21 years ago

Closed 21 years ago

Last modified 18 years ago

#3 closed defect (fixed)

CholeskiInverse doesn't return the inverse matrix of the argument

Reported by: César Pérez Álvarez Owned by: danirus
Priority: highest Milestone:
Component: Math Version: head
Severity: major Keywords: TOL
Cc:

Description

You can execute this example to see that CholeskiInverse doesn't return the
inverse matrix of the argument.
Matrix A = SetMat(SetOfSet
(

SetOfReal(1/4,1/8,1/9),
SetOfReal(1/8,1/8,1/9),
SetOfReal(1/9,1/9,1/9)

));

See that A is positive defined
Matrix A_ = CholeskiInverse(A);

You can see that this product doesn't return the identity matrix of dim 3
Matrix U = A*A_;

Change History (4)

comment:1 Changed 21 years ago by danirus

Status: new → assigned

comment:2 Changed 21 years ago by danirus

Resolution: → fixed
Status: assigned → closed

CholeskiInverse behavior, in matgra.cpp, has been rewritten to avoid confusing
internal casts in Win32 platform.
I have seen some complex and confused behavior in classes hierarchy of
BMatrix<Any>. I think that all of them should be rewritten.

comment:3 Changed 21 years ago by manuelb

Component: Matrix → TYPE_Matrix
Keywords: Functions removed
product: TOL Functions → TOL

Moved to TOL product.

comment:4 Changed 18 years ago by Víctor de Buen Remiro

bug_file_loc: → http://cvs.tol-project.org/viewcvs.cgi/tol_tests/tol/Bugzilla/bug_000003
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